/Engine/Source/Runtime/SlateCore/Public/Brushes/SlateRoundedBoxBrush.h
Creates and initializes a new instance with the specified color and corner radius
template<typename FillColorType, typename RadiusType> FSlateRoundedBoxBrush ( const FillColorType & InColor, RadiusType InRadius, const [UE::Slate::FDeprecateVector2DParameter](API\Runtime\SlateCore\Types\FDeprecateVector2DParameter) & InImageSize )